12-06-2014 дата публикации
Номер: US20140165236A1
Принадлежит:
The invention refers to a method for analyzing a defect of an optical element for the extreme ultra-violet wavelength range comprising at least one substrate and at least one multi-layer structure, the method comprising the steps: (a) determining first data by exposing the defect to ultra-violet radiation, (b) determining second data by scanning the defect with a scanning probe microscope, (c) determining third data by scanning the defect with a scanning particle microscope, and (d) com-bining the first, the second and the third data. 126.-. (canceled)27. A method of analyzing a defect of an optical element for the extreme ultra-violet wavelength range , the optical element comprising a substrate and a multi-layer structure , the method comprising:determining first data by exposing the defect to ultra-violet radiation;determining second data by scanning the defect with a scanning probe micro-scope;determining third data by scanning the defect with a scanning particle micro-scope; andcombining the first, the second and the third data.28. The method according to claim 27 , further comprising using the scanning particle microscope to at least partially compensate the defect.29. The method according to claim 27 , further comprising: a) generating a mark by locally depositing material on an at least one element selected from the group consisting of the multi-layer structure and an absorber structure of the optical element; and/or b) removing a mark by etching a local depression into an absorber structure of the optical element.30. The method according to claim 29 , further comprising using the scanning particle microscope to generate the mark.31. The method according to claim 29 , wherein combining the first claim 29 , the second and the third data comprises compensating deviations with respect to at least one member selected from the group consisting of the mark claim 29 , a scale of the first data claim 29 , a scale of the second data claim 29 , a scale of the third ...
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